I think the correct answer from the choices listed above is option 4. The refrigerator car is the invention which was most important in revolutionizing the meat industry. It <span>is a </span>refrigerated <span>boxcar, a piece of railroad rolling stock designed to carry perishable freight at specific temperatures.</span>
Slavery was crucial in Texas since they were counting on them to carry the Economy, the slaves had to grow cotton sice it was the primary income of money during the 1820s.
